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3 years ago

PLEASE HELP ME ASAP I NEED HELP PLEASE HELP AND IF U HAVE A QUESTION CLICK ASK DETAILS!!!!!!!!!!!!!!

1 answer:

6 0

When water freezes the molecules become stronger. When the molecules become stronger they expand . The crystalline arrangement is less dense than that of the molecules in liquid form which makes the ice less dense than the liquid water.

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Water intoxication occurs when

jeyben [28]

Water intoxication occurs when:
water is consumed in larger amounts without much electrolyte take in.

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3 years ago

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Whats the difference between relative order and an absolute date.

Hitman42 [59]

Hi there! Relative order is an advanced order type and a absolute date is the process of determing a age.

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4 years ago

How many grams of carbon monoxide are needed to react with an excess of iron (III) oxide to produce 198.5 grams of iron? Fe2O3(s

erastova [34]

Answer : The grams of carbon monoxide needed are 148.89 g

Solution : Given,

Mass of iron, Fe = 198.5 g

Molar mass of iron, Fe = 56 g/mole

Molar mass of carbon monoxide, CO = 28 g/mole

First we have to calculate the moles of iron, Fe.

$\text{ Moles of Fe}=\frac{\text{ Mass of Fe}}{\text{ Molar mass of Fe}}=\frac{198.5g}{56g/mole}=3.545moles$

The balanced chemical reaction is,

$Fe_2O_3(s)+3CO(g)\rightarrow 3CO_2(g)+2Fe(s)$

From the balanced reaction, we conclude that

2 moles of iron produces from the 3 moles of carbon monoxide

3.545 moles of iron produces from the $\frac{3}{2}\times 3.545=5.3175$ moles of carbon monoxide

Now we have to calculate the mass of carbon monoxide, CO.

$\text{ Mass of CO}=\text{ Moles of CO}\times \text{ Molar mass of CO}$

$\text{ Mass of CO}=(5.3175moles)\times (28g/mole)=148.89g$

Therefore, the grams of carbon monoxide needed are 148.89 g

7 0

3 years ago

Which of the following statements best compares the wavelengths of the regions of the electromagnetic spectrum? O Microwaves are

scZoUnD [109]

Answer:

infrared waves are longer than gamma rays

Explanation:

according to the order :

radio, microwaves, infrared, light, ultraviolet, X-ray, gamma rays

radio waves have the highest wavelenght and lowest frequency, gamma rays have the highest frequency and lowest wavelength.

5 0

3 years ago

What might happen if the greenhouse effect didn't exist?

Dima020 [189]

The earth wouldn’t have an atmosphere

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3 years ago

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